Note: All of these will require you to activate them from the title screen.
|Hold L and R. While still holding them, press Up, Down, Right, Left, Y, Y, X, X. If done correctly, a sound should play.
|Unlock all characters, their alt voices, BGM, backgrounds, and player icons from Adventure Mode. Also, earn 9999 Credits.
|Hold L when selecting the opponent in the character select screen
|Set CPU at max level
|Hold L+R when selecting Play in the screen after character selection
|Set self as max-level CPU
|Hold R when selecting Play in the screen after character selection
|Set self as CPU